Gas burner



J; M. AXTELL GAS BURNER March 17, 1931.

Filed July 9. 1928 2 awuenlfoz J-M.AXI'ELL Patented Mar. 17, 1931 n sr res PATENT OFFKIE' GAS BURNER Application filed July 9, 1928. Serial No. 291,377.

My invention relates to gas burners and particularly to burners for heating furnaces, boilers, ovens, and the like; and the object is to provide highly efficient burners which are 5 simple in construction and operation. ()ne advantage is that a direct feeding of the gas is provided and a co-operative feeding of gas is provided for maintaining the combustion of the gas. Another advantage is the means 19 for regulating the amount or volume of air that must be supplied to the burners. Other objects and advantages will be fully explained in the following description and the invention will be more particularly pointed out in 15 the claims.

Reference is had to the accompanying drawings which form a part of this application.

Fig. 1 is a longitudinal section of the burner.

Fig. 2 is a transverse section, taken on the line 2 2 of Fig. 1.

Fig. 3 is a plan view of the burner.

Fig. 4 is a face view of the burner.

Similar characters of reference are used to indicate the same parts throughout the several views.

The burner is provided with a casing 1 which has inwardly projecting ribs 2 which space the burner cylinder from the casing. This leaves air passage all about the burner cylinder 3. The burner is provided with a central cylindrical air feed 4: which is integral with the burner cylinder 3. The air feed cylinder at is spaced rom the burner cylinder 3, providing a circular space 5 for containing a head of gas. Gas is supplied to this space 5 by a supply pipe 6. On one side of the casing a screw bolt 7 spaces the burner cylinder 3 from the casing 1 instead of a rib 2.

The burner has no provision for mixing air with the gas prior to ignition, but at the point of ignition air is forced into the burning The burner has a frusto-conical cavity 7 in. the nozzle thereof. The cylindrical air feed duct terminates in the cavity 7. Provision is made for regulating the amount or volume of air that passes through the tube 4. A nipple 8 is screwed into the receiving end of the tube 4. A cap 9 is mounted on the nipple 8 and is adjustable thereon. The nipple 8 constitutes a continuation of the air 'eed 4. The crown of the cap 4 has relatively large openings 10 for the admission of air to the tube l. The flange member 11 extends radially far enough to cover the space l2hetween the burner cylinder 3 and casing 1. The cap 9 can be used to let more or less air into the tube 4; and more or less air in the space around the burner cylinder 3. The cap 9 may be manually or otherwise moved along on the nipple 8 for the purpose of controlling the volume of air to be admitted through the burner.

The burner has a plurality of apertures or nozzles 13 in the flat portion and a plurality of apertures or nozzles 14 in the beveled por tion for the discharge of gas to be ignited. When the burner is in operation, drafts of air will be created through openings 10 and space 12. The air so furnished is necessary to support combustion. Without this supply of air the burner would not operate at all. The air furnishes the necessary supply of oxygen to the burning gas. The burner nozzles 14 support combustion and prevent a vacuum in the middle of the flame and serve somewhat as a pilot to maintain the ignition and a baffle wall is not necessary.

What I claim, is,

1. A gas burner comprising casing, a chamber mounted in said casing for containing a head of gas, a cylindrical air feed integral with said chamber and centrally positionedtherein, an open ended nipple screwed into the receiving end of said air feed, said chamber having a plurality of gas discharge apertures, means for supplying gas to said chamber, and a cap for controlling the vol- 9 ume of air to be admitted to said cylindrical 'air feed.

2. A gas burner comprising a casing, a chamber positioned in said casing and spaced therefrom, a central cylindrical air feed inte ral with said chamber and terminating with an enlargement at the end thereof, means for supplying gas to said chamber, an open ended nipple screwed into the end of said air feed, said chamber having a plurality of discharge nozzles in line with said chamber and a plurality of discharge nozzles in said enlargement for discharging jets of gas at angles to the length of said chamber for causing flames therefrom to impinge upon each other, and a cap having lateral openings in the sides thereof for admitting air to said nipple and movably mounted on said nipple and having a flange adapted to open and close the space between said casing and chamber for regulating the volume of air to said burner.

3. A gas burner comprising a casing, a

cylindrical chamber mounted in said casing and projecting from said casing, said casing having inwardly projecting ribs and a screw bolt carried thereby for spacing said chamber from said casing, said chamber having a frusto-conical cavity at the front end there of and having a plurality of gas discharge nozzles in line with said chamber and a plurality of gas discharge nozzles in said cavity at angles to each other for causing jets of flame therefrom to impinge upon each other, means for admitting gas to said chamber means for permitting circulation of air about said chamber at the discharge end thereof and in line therewith and a central air feed having its forward end enlarged to a frustoconical cavity for directing blasts of air centrally through said chamber and through the angular jets of flame coming from said chamber into said cavity.

In testimony whereof, I set my hand, this 30th day of June, 1928.

JAY M. AXTELL. 

